Drilling mechanism



' Dec. 14 192e.

E. G. GARTIN DRILLING yMEcmxNIsM Filed Oct. 17, 1921 rari/15912 al Il m Patented Der. lfl, i925.,

G. GARTEN, OF CLREMONI, NEVT HAM?? WIRE, ASSIGNR "IV SULLIVAN MACHINERY CIv/PATY, A COROR'ATIGN 03F MASSACIUSETTS.

DRILLING MECI-IANISM.

Application led. Gctober 17, 1921. Serial No. 5083.33.

Nly invention relates to drilling mechanism and more particularly to drilling` mechanisms ot the pneumatic feed type.

An object of my invention is to provide an improved drillingl mechanism. Another object of my invention is to pr'ovide an improved pneumatic feed type drillingmechanism of an exceedingly compact nature. A further object of my invention is to provide an improved pneumatic drilling mechanism that may be very conveniently controlled. Other objects and advantages ot my invention will hereinafter appear.

In the accompanying drawings I have shown it'or purposes of illustration one form which my invention may assume in practice.

In these drawings,-

Fig. l is a central verticalV longitudinal section through the illustrative form of my invention.

Fig. 2 is a transverse section on the line 2--2 ofFig. l.

For purposes of description, the illustrative form of my inventionmay be divided into the drilling mechanism, generally designated 1, and the feeding mechanism generally designated 2. The drilling mechanism comprises a cylinder 3 havinga bore l in which a piston generally indicated by 5 is v reciprocable. The piston 5 has spaced heads 6 and 7 joined by a reduced portion 8 whereby an annular channel 9 is `formed which serves in a well known manner in the distribution of motive fluid. A striking` bar 10 is formed'at theV 'forward en d oit the piston 5 and by means of straight and spiral grooves 11 and l2, respectively, cooperating with a ratchet mechanism 13 and a chuck member lhrotation is imparted to a. drill steel 15 atl the same time that the percussive action ot" the piston is transmitted thereto by way of a striking plug 16. Fluid pressure 'to operate the piston is transmitted thereto by way of inlet ports 17, supplied with `fluid by passageslS vextending` longitudinally in the wall oit the cylinder, the supply of 'fluid to these passages being controlledby a manually controlled valve `i9 in a well known manner. IIhe exhaust from the cylinder is accomplished by way oi a pair of passages 2O vtraversing the wall oit the cylinder at longitudinally separated points. Further description of the structure ot this drilling mechanism and its mode of operation is believed to be unnecessary as,

in its general detail, this motor is now well known and in general commercial use.

rlhe cylinder member 3 has an integral eX- tension 2l,the cylinder bore 4 being` closed oil1 by a head member 22@ rIhe extension 2l at its rear end is closed by a piston head 9.3 which is slidable in a cylinder member 241 the latter being ot such length that when the piston 23 is in the bottom of the cylinder, the entire motor cylinder lies within the cylinder member 24. For the purpose of causing forward. ifeed of the piston 23 and accordingly ot the motor l, I have arranged a longitudinally extending passage 25 in the Wall of the cylinder member 3 and itsentension 2l and fluid is supplied to this passage by way of a port 26 formed in the valve 19 in a well known manner, suitable means. not shown, being` also provided to permit the exhaust et fluid from the lower end ot the cylinder through the port 25.

For the purpose of supplying cleansing fluid to thedrill steel l5, I have arranged a long water supply tube 27 mounted in the piston 23 and extending completely through the cylinder, piston, and striking bar and tappet ofthe motor. Fluid is supplied to this tube by way of a passage 28 formed in the piston 23 and a longitudinallyextending passage 29 in the vwall of the `member 3 from a pipe 30 connected with a suitable source, the supply being controlled by a valve 3l, the latter being co-nnected for convenience to the handle 32 which enables the ready holding of the drill in desired position. It was noted that exhaust occurred by way of ports 20 to the space intermediate the cylinder 24 and theoutside of the combined motor and piston member. A port 33 at the top of the frame permits a downwardly directed exhaust.

From the toregoing description, the mode of operation oit my improved drilling mechanism will bereadily apparent. By manipulation ot the valve 19 in a well known manner, fluid pressure may be supplied through the passage 26 and passage 25 to the lower end or' the feed cylinder, and the piston 23 together with the motor ted bodily forward. liv suitable manipulation of the valve 19, fluid may also be admitted to the passages 18 and cause reciprocation of the piston 5 and so percussion on and rotation oi" the drill steel l5. For the purpose ot cleansing the hole of `the cuttings7 liquid 2.: 1. Athe operations in such close quarters in a much easier and quicker way than cannow be done.

lVhile I have in this Vapplication described one form which my .invent-ion may assume in practice, it will be understood that this form of the saine is shown for purposes of' illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the-scope of the appended claims.

That I claim. as new and 'desire to secure by Letters Patent is:

1.11 drilling apparatus, fluid actuated feeding means including afeed cylinder, a hollow feed piston mechanism including a hollow piston rod therein, a drillingl motor telescoping,` -within said feedcylindfer and carried by said piston'rod spaced longitudinally from said-hollow portion, and means for supplyingmotive fluid to said motor and said feed cylindres:` comprising passage means formed wholly in the vwalls of the hollow portion of said feed piston mechanism.

2. A ,drilling apparatus, fluid actuated feeding means including' a feed cylinder, hollow feed piston'inechanism including a hollow piston rod-therein, a drillingrmotor telescopinfg` within said feed cylinder, and means for supplying motive fluid 1 to said motor, and pressure fluid to said cylinder to feedthe motor toward the work including passages formed wholly in the wall of said piston rod.

'3. In a drillingapparatus, a feed cylinder, a drillingmotor tel-escoping'therein, a feed piston lattached to said motor, and means for supplying cleansing fluid t-o a drill steel operated upon by said motor including a'cleansinjg fluid supply tube extending; completely vthrough said motor and rigidly mountedv in Vsaid feed piston.

el. In a drilling apparatus, a feed cylinder, a drilling motor telescopiug therein, a vfeed piston attached to said motoigfmeans for supplying 'cleansingduid to a drill steel operated upon by said motor including a cleansingl fluid supply tube extending completely through said motor and mounted in said feed piston, and means for supply cleansing fluid tosaid tube including pas'.F

lsages formed in said feed piston.

hollow chamber, a drillingl motor ca ied entirely within said piston rou echar sm, and

means for supplying cleansing` fluid to ra drill-steel operated on hy said drilling motor including a Atute extending' completely through said chamber and said motor.

. In a drilling` apparatus, a fluid actuated feeding` means including feed cylinder, a hollow piston red therein havingl a piston secured thereto, a drilling motor carried within said rod, fluid pressure supply means, includingl passages formed in said rod for condusctinuq fluid to said feed cylinderand said drilling motor. Vand mean-s carried by said rod i'o: controllin'g,l said supply means.

8. In a dri-lling apparatus, a fluid actuated feeding means including stationary feed cylinder, a hollow feed piston rod telescopically arranged therein and movable relative thereto, a 'fluid actuated drilling motor arranged in said rod and movable rel-ative to said cylinder, and .meansincluding a valve carried by said movable rod for controlling the fluid flow to said motor and said feed cylinder.

9. In a drilling apparatus, fluid actuated feeding means including relatively movable telescopic cylinder and Vpis-ton elements one .of which is hollow, a llui'd actuated motor .arranged within one of said elements, and means carried by the movable element 'for controlling-the fluid flow-to said motor `Vand saitlfeeding means. 10. In a drilling apparatus, a feed cylinder, a hollow feed pistonrod telescopically arranged therein, a drilling motor carried within said rod, cleansing fluid supply means for the drill 'steel including a tube extending completely through said piston rod and motor, and means formed in said rod for conducting liquid to said tube.

1l. In a-drilling` apparatusuid actuated feeding means including a feed cylinder, a hollow feed piston rod telescopically arranged therein, a fluidactuated drilling motor arranged within said rod, and means formed in said rod for conducting' motive fluid to said motor and-operating fluid to said-feed cylinder.

12. In a drilling apparatus,fluid actuated feeding,- means including a feed cylinder, a fluid actuated 'drilling motor telescoping 'Iii therein, a feed piston attached to said motor, and means for supplying motive fluid to said motor and operating fluid to saidA feed cylinder comprising passages formed in the cylinder of said mot-or, and controlling means for said fluid supply means.

13. In a drilling apparatus,fluid actuated feeding means including a feed cylinder, a fluid actuated drilling motor telescoping therein, a feed piston attached to said niotor, cleansing fluid supply means for the drill steel extending through said motor, and means carried by said motor and movable therewith for controlling the fluid supply to said motor, said feeding means, and said cleansing fluid supply means. p

14. In a drilling apparatus, fluid actuated feeding means including` a feed cylinder, a fluid actuated drilling motor telescopng therein, a feed piston attached to said inotor, and means for distributing motive fluid to said motor including exhaust passages communicable With the interior of said feed cylinder, and exhaust means formed in said feed cylinder.

15. In a drilling apparatus, fluid actuated feeding means including a feed cylinder, a hollowT feed piston rod telescopically arranged tlierein, a fluid actuated motor to which said rod is attached, and means der, a hollow feed piston rod telescopically arranged therein, a drilling motor" arranged Within said rod, and means formed in said rod for conducting motive fluid to said motor and said feed cylinder and for conducting exhaust from said motor.

17. In a drilling apparatus, a feed cylinder, a drilling motor telescoping therein, a feed piston attached to said motor, and means for supplying cleansing fluid to a drill steel operated on by said motor including a cleansing fluid supply tube extending completely through said motor and mounted in said feed piston.

18. In a drilling apparatus, a feed cylinder, a drilling motor telescoping therein, a feed piston rod attached to the rear end of said motor and having a piston, and means for supplying cleansing fluid to a drill steel operated on by said motor including a cleansing fluid lsupply tube extending comi plete-ly through said motor and said rod and mounted in said piston. p

In testimony whereof I alfixmysignature.

ELMER Gr. GARTIN. 

